Abstract
The current state of placer research may be regarded as a transition from the descriptive mineralogy, including the study of typomorphic properties of minerals and their assemblages, to probing fine mechanisms of ore material migration in placers and the creation of quantitative models that describe an inhomogeneous multidimensional space of placer deposits taking into account regional and local factors. Placers are complex geochemical systems where the concentration of most resistant minerals is accompanied by a conversion of their physical and chemical properties that affects the quality of ore, its dressability, and fields of usage. In this work, data on specific (tin, rare metal, gold, and complex titanium–zirconium) placers are used to define the current objectives of placer mineralogy and possibilities of their realization in the study of (1) placer mineral assemblages and their modification during the placer formation, (2) primary typomorphic features of minerals as guides for provenance and placer evolution, (3) acquired typomorphic features indicating the placer formation conditions, and (4) environmental and technological aspects of placer mineralogy.
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